Even better, you can isolate what CSS applies to certain parts of the site. The Firefox extension Firebug is a great tool that lets you do just that. Just "Inspect" any element and it'll tell you what CSS properties apply to that element.

So edit the address to be http://welbog.homeip.net/glue/style/style.css (base address + stylesheet address) and you can see the CSS. That along with the source you viewed previously will give you what you need. Watch for multiple links to multiple stylesheets as well.

Firebug or the "Web Developer Tools" addins are easier, but if you don't want to add them in to your browser you can use this method.

For what it's worth, this method was highlighted on a blog somewhere by it's original creator. Unfortunately, I don't have the link. Perhaps others recall there was a circlular image on the left hand side illustrating the technique a few months ago.